Publications (3)5.51 Total impact
-
Article: egamberdieva
[show abstract] [hide abstract]
ABSTRACT: The aim of the present work was to test known bacterial plant growth-promoting strains for their ability to promote cucumber plant growth in salinated soil and to improve cucumber fruit yield by protecting these plants against soil-borne pathogens. Fifty two plant-beneficial bacterial strains were evaluated for their ability to protect plants against cucumber foot and root rot (CFRR) after bacterization of the seeds and infestation of salinated soil with the isolated F. solani pathogen. Based on the results of initial screenings, five efficient strains were selected, namely Serratia plymuthica RR-2-5-10, Stenotrophomonas rhizophila e-p10, Pseudomonas fluorescens SPB2145, P. extremorientalis TSAU20, and P. fluorescens PCL1751. All five strains are salt-tolerant since they grow well in a medium to which 3% NaCl was added. Infestation of the soil with F. solani resulted in an increase of the percentage of diseased plants from 17 to 54. Priming of seedlings with the five selected bacterial strains, reduced this proportion to as low as 10 %. In addition, in the absence of an added pathogen, all five strains showed a significant stimulatory effect on cucumber plant growth, increasing the dry weight of whole cucumber plants up to 62% in comparison to the non-bacterized control. The strains also increased cucumber fruit yield in greenhouse varying from 9 to 32 %. We conclude that seed priming with the selected microbes is a very promising approach for improving horticulture in salinated soils. Moreover, allochthonous strains isolated from non-salinated soil, from a moderate or even cold climate, and from other plants than cucumber, functioned as well as autochthonous strains as cucumber-beneficial bacteria in salinated Uzbek soils. These results show that these plant-beneficial strains are robust and they strongly suggest they can also be used successfully in case the climate gets warmer and the soils will become more salinated. Finally, the mechanisms by which they may exert their plant-beneficial action are discussed.Biology and Fertility of Soils 02/2011; 47(2):197-205. · 2.32 Impact Factor -
Article: Bacteria able to control foot and root rot and to promote growth of cucumber in salinated soils
[show abstract] [hide abstract]
ABSTRACT: The aim of the present work was to test known bacterial plant growth-promoting strains for their ability to promote cucumber plant growth in salinated soil and to improve cucumber fruit yield by protecting these plants against soil-borne pathogens. Fifty two plant-beneficial bacterial strains were evaluated for their ability to protect plants against cucumber foot and root rot (CFRR) after bacterization of the seeds and infestation of salinated soil with the isolated F. solani pathogen. Based on the results of initial screenings, five efficient strains were selected, namely Serratia plymuthica RR-2-5-10, Stenotrophomonas rhizophila e-p10, Pseudomonas fluorescens SPB2145, P. extremorientalis TSAU20, and P. fluorescens PCL1751. All five strains are salt-tolerant since they grow well in a medium to which 3% NaCl was added. Infestation of the soil with F. solani resulted in an increase of the percentage of diseased plants from 17 to 54. Priming of seedlings with the five selected bacterial strains, reduced this proportion to as low as 10 %. In addition, in the absence of an added pathogen, all five strains showed a significant stimulatory effect on cucumber plant growth, increasing the dry weight of whole cucumber plants up to 62% in comparison to the non-bacterized control. The strains also increased cucumber fruit yield in greenhouse varying from 9 to 32 %. We conclude that seed priming with the selected microbes is a very promising approach for improving horticulture in salinated soils. Moreover, allochthonous strains isolated from non-salinated soil, from a moderate or even cold climate, and from other plants than cucumber, functioned as well as autochthonous strains as cucumber-beneficial bacteria in salinated Uzbek soils. These results show that these plant-beneficial strains are robust and they strongly suggest they can also be used successfully in case the climate gets warmer and the soils will become more salinated. Finally, the mechanisms by which they may exert theit plant-beneficial action are discussed.Biology and Fertility of Soils 01/2010; 47:197-205. · 2.32 Impact Factor -
Article: Nitrogenase activities of salinated serozem soil affected by various crop cultivation practices.
[show abstract] [hide abstract]
ABSTRACT: Soil salinization is a major problem in irrigated agriculture. A field study was conducted in the Sariosiyo district in the Surkhandarya region of southeast Uzbekistan to evaluate soil nitrogenase activity and nitrogen-fixing bacteria populations in saline serozem soils under wheat, maize, and alfalfa, as well as from adjacent fallow land. Composite soil samples were randomly collected from depths of 0-10, 10-20, and 20-30 cm in autumn, winter, spring, and summer, which were then 2-mm sieved and subjected to selected microbial population analysis and enzymatic studies. The results showed that alfalfa contributed both to high nitrogenase activity and to a large nitrogen-fixing bacteria population. The fallow soil had a lower nitrogenase activity and bacterial population. The nitrogenase activity was higher in the soil from a depth of 10-20 cm in spring. Results suggest that cropping, especially suitable crop rotation, is essential to support greater microbial biomass population and nitrogenase activity for improving the biological fertility of saline and nitrogen-poor calcareous arid soils.Turkish Journal of Biology 01/2008; 32:85-90. · 0.88 Impact Factor
